Are you saying when you turn the focus knobs on the focuser, and you're looking through the eyepiece as you focus you're seeing image shift I have the XT12i and have seen image shift when focusing, it kinda bothers me, but it's not high on my repair list.

If your looking to replace your focuser check in to Moonlight Telescope. I have one on my XT10 and its direct replacement so you don't have to drill any holes. The focuser is rock solid and very smooth. I gave up trying to adjust the stock focuer.

I am all set on a focuser as I have Moonlite CR2. As for collimators I just received my Hotech SCA laser colimator which should do me for awhile until I need to check the diagonal again. For that I understand a catseye type with a sight tube is better. I tried to follow phillip d's links above but they were invalid, if this is not considered thread crapping, I am interested in recommendations for collimators. If you are seeking a laser one, the Hotech got a great review on CN and experienced ATMOB club members also highly recommend it. I got the 2" one, but the 1.25" is only about $80.

jj: The 2 best focusers are Moonlight and the Feathertouch. The Feathertouch is a tad better. The moonlight is no slouch either. Both are fine focusers, and work very well. The 2 stage model of either is what you want. When ordering the Feathertouch you also have to order an adapter. Then the focuser fits on the original base. It takes 10 minutes to install. If you would like I will look up the exact model # for you. Welcome to the forum.